Apply zprobe_zoffset in axis_is_at_home

Add variant for MAX6675 in M104

- Address issue raised in #1961

Remove set-coordinate extension of G28

Max endstopp

Macro steppercpp

Else will throw error:
@:0 B@:0
Error:No thermistors - no temperature
[ERROR] Error:No thermistors - no temperature

when no bed is defined

delete some tabs

Ensure the probe offset will always be included when homing Z.

Include axis parameter to ultralcd's line_to_current

Fix homing of YZ with DUAL_X_CARRIAGE

Fix for #1946

Add DISPLAY_CHARSET_HD44780_CYRILLIC as alternative in SanityCheck.h

More Beeper clean up

Add M410 QuickStop command

c'n'p ftw :/

and add some documentation - how to integrate a new font.

Syntax error.

no user will home to 0 with a max endstopp

and removed some tabs.

Centralised beep code to lcd_buzz().
From gcode_M300() and lcd_quick_feedback().

Enforced max. duration for M300 to 5 seconds.

Corrected description in 'Configuration.h'

LCD_FEEDBACK_FREQUENCY_HZ 0 gives now a silent delay of
LCD_FEEDBACK_FREQUENCY_DURATION_MS.

Corrected wrong order of parameters.

Fixed compilation error "error: stray ‘\357’ in program"

Added new PID autotune info, to make easy copy & paste results to marlin

Fixed jump in speed at high accelerations on axes with lots of steps

Introduced in commit 697ee2dc and later spread to other files.